20328618 has 16 divisors (see below), whose sum is σ = 40702176. Its totient is φ = 6768720.

The previous prime is 20328589. The next prime is 20328629. The reversal of 20328618 is 81682302.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8080 + ... + 10292.

It is an arithmetic number, because the mean of its divisors is an integer number (2543886).

Almost surely, 2^20328618 is an apocalyptic number.

20328618 is an abundant number, since it is smaller than the sum of its proper divisors (20373558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20328618 is a wasteful number, since it uses less digits than its factorization.

20328618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3749.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 20328618 is about 4508.7268713019. The cubic root of 20328618 is about 272.9203701794.

The spelling of 20328618 in words is "twenty million, three hundred twenty-eight thousand, six hundred eighteen".